Fat-Cat Thru-Wall Cat Tunnel

Fat-Cat Thru-Wall Cat Tunnel is a custom, 3D-printed passage that lets a larger cat glide between rooms through a standard wall. It’s the practical solution for households with bigger cats who want a private, canine-free route to food and litter, without adding extra doors or clutter.

Designed for real-world walls, this tunnel fits a typical 2x4 wall with 1/2" drywall. It sits 5" deep, and the inner diameter of the opening measures 7.125", giving comfortable room for bigger cats to pass through without feeling squeezed. The kit arrives as a straightforward three-piece set (two flat faces and a tunnel connector) that’s engineered for clean, secure installation inside your wall cavity.

• Three-piece modular design — two flat faces plus a tunnel connector that come together for a neat, sturdy fit inside standard walls.
• Cat-friendly sizing — a generous 7.125" inner diameter and 5" depth ensure even larger cats can move through with ease.
• Solid mounting — uses black 10-24, 1" long machine screws to securely fasten the assembly inside the wall.
• Color and finish options — available in multiple colors to suit your decor. Rainbow prints will have varied color patterns due to filament manufacturing. Screws are color-matched for Black and White variants; other colors ship with standard stainless steel screws (you can paint them to match after installation).
• Post-production quality — each unit is inspected after printing to ensure it meets our standards; please note minor surface imperfections are normal with 3D printing and do not affect strength.
• Privacy + pet management — an ideal solution for giving your cat access to a closet or dedicated space for food and litter while reducing dog access to these areas.
• IP protection — we don’t provide STL/3D digital files to protect our design and craftsmanship; this helps preserve unique, high-quality builds for customers.

The Fat-Cat Thru-Wall Cat Tunnel is particularly well-suited for households with:

• Large or senior cats who benefit from extra space when moving through openings
• Homes with a dedicated food/litter closet that you want to keep dogs from accessing
• Owners seeking a low-profile, door-free way to improve feline mobility between rooms

Installation and care are simple with a few practical tips:

1. Plan a location where the tunnel will pass cleanly through a standard 2x4 wall with 1/2" drywall, ensuring the wall cavity has enough space for the 5" depth.
2. Assemble the three pieces (two flat faces and the tunnel connector) and secure with the provided black 10-24, 1" screws. If you’re using a color option that ships with silver screws, you can substitute or paint them to match.
3. Place the assembly in the wall cavity and tighten until snug, taking care not to bow or stress the drywall.
4. Options to customize the look: paint the screws to blend with your baseboards or walls, and note that color patterns for rainbow prints will vary by batch.

What you get is a durable, functional channel that respects your home layout while giving your cat the freedom to move where they want, when they want. It’s a thoughtful upgrade for multi-room homes, pet privacy, and a calmer household rhythm. If you’re considering alternatives, this through-wall solution provides a dedicated, unobtrusive route that standard pet doors can’t match for size or elegance.